It is centered on Private Property, because it’s focused on Capitalism. Property Rights are largely what separates liberals from Socialists.
Exploitation is rising in the long term. Pinkertons stopped murdering because American Unions crumbled and manufacturing was largely moved overseas, where we super-exploit for super-profits.
Liberals have been dragged kicking and screaming by radicals for their entire existance forward.
I am referring to Liberalism the ideology, and those who follow it. Of course I am speaking of the average, do you expect me to make a poll?
Most liberals like to think that they are pro-union, but Capitalism has crushed most American Unions. Most liberals think they are anti-exploitation, but support Capitalism, which is necessarily exploitative. Most liberals are indeed pro Social Programs, but not Socialism, and so they generally fall short of enacting actual change.